What do you say if you can’t make a date with a tourist group?

I’m sorry for not being able to make an appointment with the tourist group, but we can’t make an appointment because there are not enough people. If you can't make an appointment in a travel group, you need to be sincere in your attitude. First of all, you should apologize and say I'm sorry to everyone, and secondly, you can't make the appointment because the main content is not available. Saying this can not only express the theme, but also make people feel that you are trying your best.